isbjorn Posted September 20, 2009 Share Posted September 20, 2009 Hi. Well When I was driving today I noticed that the headlight/parklights/dimlight/instrument lights didnt work. If I move the headlight switch one step everything is as normal. But if I move it two steps (to start headlights) the dashboard and headlights + parkinglights goes dark. Ive checked the fuses and they where all fine and started checking the voltage from the actual switch. It has three cables that according to Rave is: Brown/blur - from main fuse/battery Blue - parkinglights Red - Mainlights (two steps) No step Brown/blur - 12v Blue - 0v Red - 0v One step Brown/blur - 12v Blue - 0v Red - 12v two steps (headlights should be on) Brown/blur - 12v Blue - 12v Red - 0v To make a long story short, my switch is broken (i assume). Or is there a relay or some hidden things i dont know about? It should be possible to test by hotwire the red cable straight from the battery or? I only wanted to get you opinion before I order a new one... thanks. Quote Link to comment Share on other sites More sharing options...
western Posted September 20, 2009 Share Posted September 20, 2009 probably got to warm & the plastic case has melted & allowed the contacts to move away from the moveable arm, a new switch will cure it. Quote Link to comment Share on other sites More sharing options...
isbjorn Posted September 20, 2009 Author Share Posted September 20, 2009 Well Ill se if I can get it opened due to lack of better thing to do. thanks.. Quote Link to comment Share on other sites More sharing options...
isbjorn Posted September 20, 2009 Author Share Posted September 20, 2009 Well its solved now. You where right, the top right pole had melted 1 mm into the plastic witch makes it impossible for the main power to go through the pin that connects with the two outgoing cable poles. Three hard blows with a hammer and a screwdriver and its works like a dream. Quote Link to comment Share on other sites More sharing options...
western Posted September 20, 2009 Share Posted September 20, 2009 a novel fix, it happens a bit to often on these switches, mine did it a few months ago, I used a new switch. Quote Link to comment Share on other sites More sharing options...
Andrew Chua Posted September 20, 2009 Share Posted September 20, 2009 it's 100 gbp from the dealership. ask me how i know. Quote Link to comment Share on other sites More sharing options...
western Posted September 20, 2009 Share Posted September 20, 2009 mine wasn't that much. 59.99 for a genuine item from LRSeries Quote Link to comment Share on other sites More sharing options...
errol209 Posted September 21, 2009 Share Posted September 21, 2009 mine wasn't that much. 59.99 for a genuine item from LRSeries A relay in the headlamp circuit would fix the issue forever - about £10 to do. A very strange little corner for Land Rover to cut, IMHO. Quote Link to comment Share on other sites More sharing options...
western Posted September 21, 2009 Share Posted September 21, 2009 but they fitted relays to the headlight circuits on later vehicles. Quote Link to comment Share on other sites More sharing options...
isbjorn Posted September 22, 2009 Author Share Posted September 22, 2009 Does a relay control the amount of volt that passes though it? I thought that that usually secured by a a fuse. And that relays are used to open connections to other circuits depending on the controller/switch. Quote Link to comment Share on other sites More sharing options...
markyboy Posted September 22, 2009 Share Posted September 22, 2009 Does a relay control the amount of volt that passes though it? I thought that that usually secured by a a fuse. And that relays are used to open connections to other circuits depending on the controller/switch. Not the amount of volts, no. It does, however, control the amount of amps through the switch. (I think that's probably what you meant?). With a relay in the circuit, the switch will only see the amps required to close the relay, which is quite small in comparison to the amps which will run through a pair of illuminated headlights. I don't know the actual amounts but I'm sure an adult will be along shortly to advise. HTH. Mark. Quote Link to comment Share on other sites More sharing options...
isbjorn Posted September 22, 2009 Author Share Posted September 22, 2009 Sorry, I ment amp. if anyone know the amount required that would be wicked. Quote Link to comment Share on other sites More sharing options...
mmgemini Posted September 22, 2009 Share Posted September 22, 2009 FYI a Range Rover Classic. The early models. Headlight switch fits and works. It also sppears to be better made. mike Quote Link to comment Share on other sites More sharing options...
LandyManLuke Posted September 22, 2009 Share Posted September 22, 2009 With a relay in the circuit, the switch will only see the amps required to close the relay, which is quite small in comparison to the amps which will run through a pair of illuminated headlights. I don't know the actual amounts but I'm sure an adult will be along shortly to advise. A Standard auto relay will switch 30-40A on its output, whilst requiring less than 1A (typically something of the order of 100 mA) to energise it. Voltage, as already mentioned, remains unchanged. You need to ensure that the supply to the fuse is suitably sized, and fused, for the load you are going to place on it. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted September 22, 2009 Share Posted September 22, 2009 Even £60 seems ludicrously expensive when you can buy a normal switch for about £3 from Vehicle Wiring Products or the nearest decent car parts supplier / electronics supplier. I don't think all the switches on my dash cost that much put together Here's a couple designed for the job, they should be available locally too: Part #64500 - does the right thing and costs £8 Part #65604 - same again but rotary. Quote Link to comment Share on other sites More sharing options...
isbjorn Posted September 22, 2009 Author Share Posted September 22, 2009 NIce, but its always nice with the original. If nothings so at least for the looks. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted September 22, 2009 Share Posted September 22, 2009 NIce, but its always nice with the original. If nothings so at least for the looks. True, the switch is clearly a design classic Quote Link to comment Share on other sites More sharing options...
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